Thomas j



T. 1. MAYALL.

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waz I WWK THoMAs i. MAYALL, `or noxuni', Massa'oHtisETais."`` f MANUFACTURE or PACKING AND Tirisiive.`

specification of Letters Patent Nanaaars, dated November a9, i859; j

To all whom it may concern:

Be it known that I, Ti-ioMAs of Roxbury, in the county of Norfolk and State of Massachusetts, have invented a new and useful method of making packing, &c., used in steamwork, hose or tubing, and similar articles that are formed by wrapping or winding sheets of elastic fabrics around a core or mandrel; and I hereby declare that the following description, taken in connection with the accompanying draw-` ings, hereinafter referredto, forms a `full and exact specification of the same, wherein I have set forth the nature and principles of my said invention by which it may be distinguished from all others of a similar class, together with such parts as I claim and desire to have secured to me by Letters Patent. j

The figures of the accompanying plateof drawings represent my improvements.` j

Figure l is a plan or top view.' of a machine for making packing. Fig. 2 is a transverse, vertical section of the same. Fig. 3 is a central, longitudinal vertical section.

The nature of my invention consists of a new method for forming packing used in valves, steam and other joints, and hose or tubing or in fact any articles .that are formed by wrapping or rolling elastic or adhesive fabrics around a central` core 4or upon a mandrel, the essential features of my new method being embodied in a machine in which thefabric used is rolled or wrapped upon a central core or upon a mandrel, between and by the action oftwo surfaces one of which is `made adjustable and by means of springs or otherwise,A caused to exert a yielding pressure upon the article to be formed, while the other surface has such a motion given to it upon or against thel first named surface as to produce the de-` sired result, viz: that of rolling up the fabric used upon a core or upon a mandrel. In my new machine the` core or the mandrel with the fabric to be wrapped around it may be fed between a revolving cylinder or a traveling straight platform and an adjustable yielding shell or table; or the reverse may be the case, viz: between a moving shell or table and an adjustable yielding cylinder or an adjustable yielding table,- it being necessary in either case that one of the surfaces between which the article to J. MAYALL,

be `formed is riied, [Simula kleid by Springer" or otherwise, sufficiently `tofallowthe` same to gradually increase` in "diameter "or `in the number of its fold or wrappings. 1 l i Having thus premised `the general features of my new methodof forming pack-3` ing, hose, &c., I will now proceed to describe..`

in detail the construction `.andoperation of a machine by which the @desired results can 1 j j j 65 i c a in the drawings represent the support-` j be accomplished.

ing framework of the machine.` j j Z) b is a cylinder havingfits bearings at c c and made to revolve injany proper man- I j 70 CZ d is a shell which turns upon centers e c andis pressed upon by springs f f at-` tached to a` bar g g moving linslots or" grooved bearings hh and` acted upon by a bent spring c', so that the shelllis.` made to" exert a yielding pressure upon" the "cylinder b b. When packing is to be made a sheet of j any suitable fabric coated `with rubber or@ gutta percha `or with `a proper cement is,`

placed upon a platform Z776. A small cylf inder or core of rubber or "gutta percliaisl` then placed in shallow grooves `Z Z'formedin the cylinder b b, and the fabric to be rolled,

around the same attached thereto. n The cylinder is then revolved `and carriesthe core sal between the revolving cylinder Z) b and the j yielding nshell d thereby revolving the 1 j core of rubber or gutta-percha and rolling or wrapping the fabric around it. This operation is continued until a sufficient nume ber of the folds ofthe fabric have been 1` wound around the core, the shell d d yield`` l ing suiiiciently to adapt itself to the grad-` ually increasing diameter of the packing and Y f yet constantly exerting `the requisite "presj sure upon the same. Hose oritubing canlbe j j 1 formed in a precisely similar manner it` being only necessary to `substitute a mandrel for the core of rubber or gutta percha.

It will be evident thatin lieu of a revolv-` ing cylinder and an adjustable yielding j ioo shell, a stationary cylinderl and a revolving i shell may be used and that instead of using j two curved surfaces like the ycylinder and its pressure shell, `two 4flatsurfaces may answer the purposes contemplated,it being only necessary in every case that one of the surfaces should exert a self adjusting yield-` 1 ing pressure upon the packing or other arti-` cle to be formed wliile'the other surface has iio sof

or wind the fabric used around the core or` mandrel.

Having thus described my improyements,

I shall state my claim as follows:

What I claim as my invention and desire to secure by Letters Patent is* Y My new method of forming packing, hose or tubing and other similar articles, the same consisting in rolling or wrapping the fabric to be used around the core or mandrel by rolling or passing the said core or mandrelrand the fabric or w'ra'pper together be; tween two surfaces, one of which exerts a self-adjusting yielding pressure upon the article to be formed, while the other surface has the necessary'motion imparted to it to roll or wind the fabric used around the core or mandrel, substantially as set forth.

- THO'S. J. MAYALL.

Witnesses y Y JOSEPH GAvnTT,

A. W. BROWN. 

